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Corolla engine oil debate
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#11
 
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Re: Corolla engine oil debate -
09-28-2006
, 11:20 AM
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On Wed, 27 Sep 2006 21:40:07 -0400, "badgolferman" REMOVETHISbadgolferman (AT) gmail (DOT) com> wrote: Joey, 9/27/2006,8:42:34 PM, wrote: I would like to followup with another question. My Highlander recommends 5W-30 and I've used this weight in Castrol Oil but....it's getting harder to find in my area but 10W-30 is plentiful. What are your thoughts on switching weights? I think it depends upon the temperature range of your area. 5W-30 oil has a wider temperature range than 10W-40, especially at colder temperatures. Most manufacturers recommend 5W-30 because it is supposedly fuel-saving compared to 10W-30. Your manual probably has a chart like mine does. |
years back. The modifiers in the multi weight stuff tend to break down
over the life of the oil. So the 10-40 they tested ended up more like
5-30 after a while. The ones with the least modifiers (i.e. the least
range) did better. That means the 10-30 will do a better job at
maintaining it's characteristics than 5-30.
Your manual should have a chart. Choose an oil from the hot end of
the chart for your Florida climate.
BTW, around here the heavier oils (like 20-50) are hard to find in
the winter, but are plentiful in the summer. Maybe your 5-30 will
be come more prevalent in the next few months.
#12
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Something else to consider. Consumer's Report did an article on oil some years back. The modifiers in the multi weight stuff tend to break down over the life of the oil. So the 10-40 they tested ended up more like 5-30 after a while. The ones with the least modifiers (i.e. the least range) did better. That means the 10-30 will do a better job at maintaining it's characteristics than 5-30. |
grade oils, and at about the same time, GM issued a statement that was
critical of SF oils as well and found that none of the 10W-40 oils met
SF standards (CR said only one 10W-40 maintained viscosity). But in
their more recent test, published about 10 years ago, they found that
all SH grade oils maintained viscosity sufficiently. That grade has
since been succeeded by SJ, SL, and currently SM.
#13
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Hi, I live in Florida and have a Corolla '94 with 112K miles in reat condition, used but not abused. What thickness oil would you recommend according to model/miles/climate? Thank you in advance, Rick |
5W-30.
Worried about thermal breakdown? Use synthetic.
Consuming more than a quart every 3000 miles? Go to 10W-30.
Getting the filter changed every time the oil is changed?
I'm still using 5W-30 in a '89 car with over 215K miles.
#14
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Rick wrote: Hi, I live in Florida and have a Corolla '94 with 112K miles in reat condition, used but not abused. What thickness oil would you recommend according to model/miles/climate? Thank you in advance, Rick Used not abused indicates it's not burning oil. I gotta agree with Ray, 5W-30. Worried about thermal breakdown? Use synthetic. Consuming more than a quart every 3000 miles? Go to 10W-30. Getting the filter changed every time the oil is changed? I'm still using 5W-30 in a '89 car with over 215K miles. |
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Scott in Florida
#15
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Kurt Krueger wrote: Something else to consider. Consumer's Report did an article on oil some years back. The modifiers in the multi weight stuff tend to break down over the life of the oil. So the 10-40 they tested ended up more like 5-30 after a while. The ones with the least modifiers (i.e. the least range) did better. That means the 10-30 will do a better job at maintaining it's characteristics than 5-30. But that article was published in the late 1980s and applied to SF grade oils, and at about the same time, GM issued a statement that was critical of SF oils as well and found that none of the 10W-40 oils met SF standards (CR said only one 10W-40 maintained viscosity). But in their more recent test, published about 10 years ago, they found that all SH grade oils maintained viscosity sufficiently. That grade has since been succeeded by SJ, SL, and currently SM. |
I can find the issue. I usually pay attention to things like that
since I keep cars forever.
#16
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On Fri, 29 Sep 2006 14:23:20 GMT, Scott in Florida askifyouwant (AT) mindspring (DOT) net> wrote: On 29 Sep 2006 05:10:57 -0700, "ACAR" <dimndsonmywndshld (AT) yahoo (DOT) com wrote: Rick wrote: Hi, I live in Florida and have a Corolla '94 with 112K miles in reat condition, used but not abused. What thickness oil would you recommend according to model/miles/climate? Thank you in advance, Rick Used not abused indicates it's not burning oil. I gotta agree with Ray, 5W-30. Worried about thermal breakdown? Use synthetic. Consuming more than a quart every 3000 miles? Go to 10W-30. Getting the filter changed every time the oil is changed? I'm still using 5W-30 in a '89 car with over 215K miles. I'm using 5W-30 in my 92 Corolla wagon with 195,000. Yeah, but you don't actually know anything about cars, so it's a miracle you haven't been using antifreeze instead of oil because it was cheaper at Walmart. |
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Scott in Florida
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